/**
 * Copyright 2011 FeedDreamwork SIG
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package org.feeddreamwork;

import java.io.*;

import javax.servlet.http.*;

public class FeedServlet extends HttpServlet {
	@Override
	public void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws IOException {
		req.setCharacterEncoding("UTF-8");
		resp.setContentType("text/html; charset=UTF-8");
		resp.setCharacterEncoding("UTF-8");

		String feedId = getFeedIdFromPath(req.getPathInfo());
		if (Utils.isNullOrEmpty(feedId)) {
			resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
			return;
		}
		FeedResult result = FeedResultCache.get(feedId);
		if (result == null) {
			FeedResultRepository feedResultRepo = new FeedResultRepository();
			try {
				result = feedResultRepo.getFeedResult(feedId);
				if (result == null) {
					resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
					return;
				}
			} finally {
				feedResultRepo.close();
			}
		}

		resp.setContentType(result.getMIMEType() + "; charset=UTF-8");
		resp.getWriter().write(result.getContent());
	}

	@Override
	public void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws IOException {
		doGet(req, resp);
	}

	private String getFeedIdFromPath(String path) {
		if (path == null)
			return "";
		return path.replaceFirst("/", "");
	}
}
